diff --git a/docs/src/api/class-locatorassertions.md b/docs/src/api/class-locatorassertions.md
index 9c53d95875..6bfd06a841 100644
--- a/docs/src/api/class-locatorassertions.md
+++ b/docs/src/api/class-locatorassertions.md
@@ -1,5 +1,4 @@
 # class: LocatorAssertions
-* langs: java, python, js
 
 The [LocatorAssertions] class provides assertion methods that can be used to make assertions about the [Locator] state in the tests. A new instance of [LocatorAssertions] is created by calling [`method: PlaywrightAssertions.expectLocator`]:
 
@@ -46,8 +45,31 @@ def test_status_becomes_submitted(page: Page) -> None:
     expect(page.locator(".status")).to_have_text("Submitted")
 ```
 
+```csharp
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Microsoft.Playwright.NUnit;
+using NUnit.Framework;
+
+using static Microsoft.Playwright.Assertions;
+
+namespace PlaywrightTests
+{
+    public class ExampleTests : PageTest
+    {
+        [Test]
+        public async Task StatusBecomesSubmitted()
+        {
+            // ..
+            await Page.ClickAsync("#submit-button");
+            await Expect(Page.Locator(".status")).ToHaveTextAsync("Submitted");
+        }
+    }
+}
+```
+
 ## method: LocatorAssertions.not
-* langs: java, js
+* langs: java, js, csharp
 - returns: <[LocatorAssertions]>
 
 Makes the assertion check for the opposite condition. For example, this code tests that the Locator doesn't contain text `"error"`:
@@ -60,56 +82,60 @@ await expect(locator).not.toContainText('error');
 assertThat(locator).not().containsText("error");
 ```
 
-## method: LocatorAssertions.NotToBeChecked
+```csharp
+await Expect(locator).Not.ToContainTextAsync("error");
+```
+
+## async method: LocatorAssertions.NotToBeChecked
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeChecked`].
 
 ### option: LocatorAssertions.NotToBeChecked.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeDisabled
+## async method: LocatorAssertions.NotToBeDisabled
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeDisabled`].
 
 ### option: LocatorAssertions.NotToBeDisabled.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeEditable
+## async method: LocatorAssertions.NotToBeEditable
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeEditable`].
 
 ### option: LocatorAssertions.NotToBeEditable.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeEmpty
+## async method: LocatorAssertions.NotToBeEmpty
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeEmpty`].
 
 ### option: LocatorAssertions.NotToBeEmpty.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeEnabled
+## async method: LocatorAssertions.NotToBeEnabled
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeEnabled`].
 
 ### option: LocatorAssertions.NotToBeEnabled.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeFocused
+## async method: LocatorAssertions.NotToBeFocused
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeFocused`].
 
 ### option: LocatorAssertions.NotToBeFocused.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeHidden
+## async method: LocatorAssertions.NotToBeHidden
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeHidden`].
 
 ### option: LocatorAssertions.NotToBeHidden.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToBeVisible
+## async method: LocatorAssertions.NotToBeVisible
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toBeVisible`].
@@ -117,7 +143,7 @@ The opposite of [`method: LocatorAssertions.toBeVisible`].
 ### option: LocatorAssertions.NotToBeVisible.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.NotToContainText
+## async method: LocatorAssertions.NotToContainText
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toContainText`].
@@ -134,7 +160,7 @@ Whether to use `element.innerText` instead of `element.textContent` when retriev
 
 ### option: LocatorAssertions.NotToContainText.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveAttribute
+## async method: LocatorAssertions.NotToHaveAttribute
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveAttribute`].
@@ -151,7 +177,7 @@ Expected attribute value.
 
 ### option: LocatorAssertions.NotToHaveAttribute.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveClass
+## async method: LocatorAssertions.NotToHaveClass
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveClass`].
@@ -163,7 +189,7 @@ Expected class or RegExp or a list of those.
 
 ### option: LocatorAssertions.NotToHaveClass.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveCount
+## async method: LocatorAssertions.NotToHaveCount
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveCount`].
@@ -175,7 +201,7 @@ Expected count.
 
 ### option: LocatorAssertions.NotToHaveCount.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveCSS
+## async method: LocatorAssertions.NotToHaveCSS
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveCSS`].
@@ -192,7 +218,7 @@ CSS property value.
 
 ### option: LocatorAssertions.NotToHaveCSS.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveId
+## async method: LocatorAssertions.NotToHaveId
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveId`].
@@ -204,7 +230,7 @@ Element id.
 
 ### option: LocatorAssertions.NotToHaveId.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveJSProperty
+## async method: LocatorAssertions.NotToHaveJSProperty
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveJSProperty`].
@@ -215,13 +241,13 @@ The opposite of [`method: LocatorAssertions.toHaveJSProperty`].
 Property name.
 
 ### param: LocatorAssertions.NotToHaveJSProperty.value
-- `value` <[Serializable]>
+- `value` <[any]>
 
 Property value.
 
 ### option: LocatorAssertions.NotToHaveJSProperty.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveText
+## async method: LocatorAssertions.NotToHaveText
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveText`].
@@ -238,7 +264,7 @@ Whether to use `element.innerText` instead of `element.textContent` when retriev
 
 ### option: LocatorAssertions.NotToHaveText.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.NotToHaveValue
+## async method: LocatorAssertions.NotToHaveValue
 * langs: python
 
 The opposite of [`method: LocatorAssertions.toHaveValue`].
@@ -251,7 +277,7 @@ Expected value.
 ### option: LocatorAssertions.NotToHaveValue.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeChecked
+## async method: LocatorAssertions.toBeChecked
 * langs:
   - alias-java: isChecked
 
@@ -280,13 +306,18 @@ locator = page.locator(".subscribe")
 expect(locator).to_be_checked()
 ```
 
+```csharp
+var locator = Page.Locator(".subscribe");
+await Expect(locator).ToBeCheckedAsync();
+```
+
 ### option: LocatorAssertions.toBeChecked.checked
 - `checked` <[boolean]>
 
 ### option: LocatorAssertions.toBeChecked.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeDisabled
+## async method: LocatorAssertions.toBeDisabled
 * langs:
   - alias-java: isDisabled
 
@@ -315,10 +346,15 @@ locator = page.locator("button.submit")
 expect(locator).to_be_disabled()
 ```
 
+```csharp
+var locator = Page.Locator("button.submit");
+await Expect(locator).ToBeDisabledAsync();
+```
+
 ### option: LocatorAssertions.toBeDisabled.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeEditable
+## async method: LocatorAssertions.toBeEditable
 * langs:
   - alias-java: isEditable
 
@@ -347,10 +383,15 @@ locator = page.locator(".input")
 expect(locator).to_be_editable()
 ```
 
+```csharp
+var locator = Page.Locator("input");
+await Expect(locator).ToBeEditableAsync();
+```
+
 ### option: LocatorAssertions.toBeEditable.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeEmpty
+## async method: LocatorAssertions.toBeEmpty
 * langs:
   - alias-java: isEmpty
 
@@ -379,10 +420,15 @@ locator = page.locator("div.warning")
 expect(locator).to_be_empty()
 ```
 
+```csharp
+var locator = Page.Locator("div.warning");
+await Expect(locator).ToBeEmptyAsync();
+```
+
 ### option: LocatorAssertions.toBeEmpty.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeEnabled
+## async method: LocatorAssertions.toBeEnabled
 * langs:
   - alias-java: isEnabled
 
@@ -411,10 +457,15 @@ locator = page.locator("button.submit")
 expect(locator).to_be_enabled()
 ```
 
+```csharp
+var locator = Page.Locator("button.submit");
+await Expect(locator).toBeEnabledAsync();
+```
+
 ### option: LocatorAssertions.toBeEnabled.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeFocused
+## async method: LocatorAssertions.toBeFocused
 * langs:
   - alias-java: isFocused
 
@@ -443,10 +494,15 @@ locator = page.locator('input')
 expect(locator).to_be_focused()
 ```
 
+```csharp
+var locator = Page.Locator("input");
+await Expect(locator).ToBeFocusedAsync();
+```
+
 ### option: LocatorAssertions.toBeFocused.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeHidden
+## async method: LocatorAssertions.toBeHidden
 * langs:
   - alias-java: isHidden
 
@@ -475,10 +531,15 @@ locator = page.locator('.my-element')
 expect(locator).to_be_hidden()
 ```
 
+```csharp
+var locator = Page.Locator(".my-element");
+await Expect(locator).ToBeHiddenAsync();
+```
+
 ### option: LocatorAssertions.toBeHidden.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toBeVisible
+## async method: LocatorAssertions.toBeVisible
 * langs:
   - alias-java: isVisible
 
@@ -507,9 +568,14 @@ locator = page.locator('.my-element')
 expect(locator).to_be_visible()
 ```
 
+```csharp
+var locator = Page.Locator(".my-element");
+await Expect(locator).ToBeVisibleAsync();
+```
+
 ### option: LocatorAssertions.toBeVisible.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toContainText
+## async method: LocatorAssertions.toContainText
 * langs:
   - alias-java: containsText
 
@@ -543,6 +609,12 @@ expect(locator).to_contain_text("substring")
 expect(locator).to_contain_text(re.compile(r"\d messages"))
 ```
 
+```csharp
+var locator = Page.Locator(".title");
+await Expect(locator).ToContainTextAsync("substring");
+await Expect(locator).ToContainTextAsync(new Regex("\\d messages"));
+```
+
 Note that if array is passed as an expected value, entire lists of elements can be asserted:
 
 ```js
@@ -570,6 +642,11 @@ locator = page.locator("list > .list-item")
 expect(locator).to_contain_text(["Text 1", "Text 4", "Text 5"])
 ```
 
+```csharp
+var locator = Page.Locator("list > .list-item");
+await Expect(locator).ToContainTextAsync(new string[] { "Text 1", "Text 4", "Text 5" });
+```
+
 ### param: LocatorAssertions.toContainText.expected
 * langs: python, js
 - `expected` <[string]|[RegExp]|[Array]<[string]|[RegExp]>>
@@ -577,7 +654,7 @@ expect(locator).to_contain_text(["Text 1", "Text 4", "Text 5"])
 Expected substring or RegExp or a list of those.
 
 ### param: LocatorAssertions.toContainText.expected
-* langs: java
+* langs: java, csharp
 - `expected` <[string]|[RegExp]|[Array]<[string]>|[Array]<[RegExp]>>
 
 Expected substring or RegExp or a list of those.
@@ -590,7 +667,7 @@ Whether to use `element.innerText` instead of `element.textContent` when retriev
 ### option: LocatorAssertions.toContainText.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toHaveAttribute
+## async method: LocatorAssertions.toHaveAttribute
 * langs:
   - alias-java: hasAttribute
 
@@ -619,6 +696,11 @@ locator = page.locator("input")
 expect(locator).to_have_attribute("type", "text")
 ```
 
+```csharp
+var locator = Page.Locator("input");
+await Expect(locator).ToHaveAttributeAsync("type", "text");
+```
+
 ### param: LocatorAssertions.toHaveAttribute.name
 - `name` <[string]>
 
@@ -631,7 +713,7 @@ Expected attribute value.
 
 ### option: LocatorAssertions.toHaveAttribute.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toHaveClass
+## async method: LocatorAssertions.toHaveClass
 * langs:
   - alias-java: hasClass
 
@@ -660,6 +742,11 @@ locator = page.locator("#component")
 expect(locator).to_have_class(re.compile(r"selected"))
 ```
 
+```csharp
+var locator = Page.Locator("#component");
+await Expect(locator).ToHaveClassAsync(new Regex("selected"));
+```
+
 Note that if array is passed as an expected value, entire lists of elements can be asserted:
 
 ```js
@@ -685,6 +772,11 @@ locator = page.locator("list > .component")
 expect(locator).to_have_class(["component", "component selected", "component"])
 ```
 
+```csharp
+var locator = Page.Locator("list > .component");
+await Expect(locator).ToHaveClassAsync(new string[]{"component", "component selected", "component"});
+```
+
 ### param: LocatorAssertions.toHaveClass.expected
 * langs: python, js
 - `expected` <[string]|[RegExp]|[Array]<[string]|[RegExp]>>
@@ -692,7 +784,7 @@ expect(locator).to_have_class(["component", "component selected", "component"])
 Expected class or RegExp or a list of those.
 
 ### param: LocatorAssertions.toHaveClass.expected
-* langs: java
+* langs: java, csharp
 - `expected` <[string]|[RegExp]|[Array]<[string]>|[Array]<[RegExp]>>
 
 Expected class or RegExp or a list of those.
@@ -700,7 +792,7 @@ Expected class or RegExp or a list of those.
 ### option: LocatorAssertions.toHaveClass.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toHaveCount
+## async method: LocatorAssertions.toHaveCount
 * langs:
   - alias-java: hasCount
 
@@ -729,6 +821,11 @@ locator = page.locator("list > .component")
 expect(locator).to_have_count(3)
 ```
 
+```csharp
+var locator = Page.Locator("list > .component");
+await Expect(locator).ToHaveCountAsync(3);
+```
+
 ### param: LocatorAssertions.toHaveCount.count
 - `count` <[int]>
 
@@ -736,7 +833,7 @@ Expected count.
 
 ### option: LocatorAssertions.toHaveCount.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toHaveCSS
+## async method: LocatorAssertions.toHaveCSS
 * langs:
   - alias-java: hasCSS
 
@@ -765,6 +862,11 @@ locator = page.locator("button")
 expect(locator).to_have_css("display", "flex")
 ```
 
+```csharp
+var locator = Page.Locator("button");
+await Expect(locator).ToHaveCSSAsync("display", "flex");
+```
+
 ### param: LocatorAssertions.toHaveCSS.name
 - `name` <[string]>
 
@@ -777,7 +879,7 @@ CSS property value.
 
 ### option: LocatorAssertions.toHaveCSS.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toHaveId
+## async method: LocatorAssertions.toHaveId
 * langs:
   - alias-java: hasId
 
@@ -806,6 +908,11 @@ locator = page.locator("input")
 expect(locator).to_have_id("lastname")
 ```
 
+```csharp
+var locator = Page.Locator("input");
+await Expect(locator).ToHaveIdAsync("lastname");
+```
+
 ### param: LocatorAssertions.toHaveId.id
 - `id` <[string]|[RegExp]>
 
@@ -814,7 +921,7 @@ Element id.
 ### option: LocatorAssertions.toHaveId.timeout = %%-assertions-timeout-%%
 
 
-## method: LocatorAssertions.toHaveJSProperty
+## async method: LocatorAssertions.toHaveJSProperty
 * langs:
   - alias-java: hasJSProperty
 
@@ -844,19 +951,24 @@ locator = page.locator(".component")
 expect(locator).to_have_js_property("loaded", True)
 ```
 
+```csharp
+var locator = Page.Locator(".component");
+await Expect(locator).ToHaveJSPropertyAsync("loaded", true);
+```
+
 ### param: LocatorAssertions.toHaveJSProperty.name
 - `name` <[string]>
 
 Property name.
 
 ### param: LocatorAssertions.toHaveJSProperty.value
-- `value` <[Serializable]>
+- `value` <[any]>
 
 Property value.
 
 ### option: LocatorAssertions.toHaveJSProperty.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toHaveText
+## async method: LocatorAssertions.toHaveText
 * langs:
   - alias-java: hasText
 
@@ -891,6 +1003,13 @@ expect(locator).to_have_text(re.compile(r"Welcome, Test User"))
 expect(locator).to_have_text(re.compile(r"Welcome, .*"))
 ```
 
+```csharp
+var locator = Page.Locator(".title");
+await Expect(locator).ToHaveTextAsync(new Regex("Welcome, Test User"));
+await Expect(locator).ToHaveTextAsync(new Regex("Welcome, .*"));
+```
+
+
 Note that if array is passed as an expected value, entire lists of elements can be asserted:
 
 ```js
@@ -916,6 +1035,11 @@ locator = page.locator("list > .component")
 expect(locator).to_have_text(["Text 1", "Text 2", "Text 3"])
 ```
 
+```csharp
+var locator = Page.Locator("list > .component");
+await Expect(locator).toHaveTextAsync(new string[]{ "Text 1", "Text 2", "Text 3" });
+```
+
 ### param: LocatorAssertions.toHaveText.expected
 * langs: python, js
 - `expected` <[string]|[RegExp]|[Array]<[string]|[RegExp]>>
@@ -923,7 +1047,7 @@ expect(locator).to_have_text(["Text 1", "Text 2", "Text 3"])
 Expected substring or RegExp or a list of those.
 
 ### param: LocatorAssertions.toHaveText.expected
-* langs: java
+* langs: java, csharp
 - `expected` <[string]|[RegExp]|[Array]<[string]>|[Array]<[RegExp]>>
 
 Expected substring or RegExp or a list of those.
@@ -935,7 +1059,7 @@ Whether to use `element.innerText` instead of `element.textContent` when retriev
 
 ### option: LocatorAssertions.toHaveText.timeout = %%-assertions-timeout-%%
 
-## method: LocatorAssertions.toHaveValue
+## async method: LocatorAssertions.toHaveValue
 * langs:
   - alias-java: hasValue
 
@@ -966,6 +1090,11 @@ locator = page.locator("input[type=number]")
 expect(locator).to_have_value(re.compile(r"[0-9]"))
 ```
 
+```csharp
+var locator = Page.Locator("input[type=number]");
+await Expect(locator).ToHaveValueAsync(new Regex("[0-9]"));
+```
+
 ### param: LocatorAssertions.toHaveValue.value
 - `value` <[string]|[RegExp]>
 
diff --git a/docs/src/api/class-pageassertions.md b/docs/src/api/class-pageassertions.md
index e90598a69e..e8805b3850 100644
--- a/docs/src/api/class-pageassertions.md
+++ b/docs/src/api/class-pageassertions.md
@@ -1,5 +1,4 @@
 # class: PageAssertions
-* langs: java, python, js
 
 The [PageAssertions] class provides assertion methods that can be used to make assertions about the [Page] state in the tests. A new instance of [PageAssertions] is created by calling [`method: PlaywrightAssertions.expectPage`]:
 
@@ -48,9 +47,31 @@ def test_navigates_to_login_page(page: Page) -> None:
     expect(page).to_have_url(re.compile(r".*/login"))
 ```
 
+```csharp
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Microsoft.Playwright.NUnit;
+using NUnit.Framework;
+
+using static Microsoft.Playwright.Assertions;
+
+namespace PlaywrightTests
+{
+    public class ExampleTests : PageTest
+    {
+        [Test]
+        public async Task NavigatetoLoginPage()
+        {
+            // ..
+            await Page.ClickAsync("#login");
+            await Expect(Page.Locator("div#foobar")).ToHaveURL(new Regex(".*/login"));
+        }
+    }
+}
+```
 
 ## method: PageAssertions.not
-* langs: java, js
+* langs: java, js, csharp
 - returns: <[PageAssertions]>
 
 Makes the assertion check for the opposite condition. For example, this code tests that the page URL doesn't contain `"error"`:
@@ -63,7 +84,11 @@ await expect(page).not.toHaveURL('error');
 assertThat(page).not().hasURL("error");
 ```
 
-## method: PageAssertions.NotToHaveTitle
+```csharp
+await Expect(page).Not.ToHaveURL("error");
+```
+
+## async method: PageAssertions.NotToHaveTitle
 * langs: python
 
 The opposite of [`method: PageAssertions.toHaveTitle`].
@@ -76,7 +101,7 @@ Expected title or RegExp.
 
 ### option: PageAssertions.NotToHaveTitle.timeout = %%-assertions-timeout-%%
 
-## method: PageAssertions.NotToHaveURL
+## async method: PageAssertions.NotToHaveURL
 * langs: python
   - alias-java: hasURL
 
@@ -89,7 +114,7 @@ Expected substring or RegExp.
 
 ### option: PageAssertions.NotToHaveURL.timeout = %%-assertions-timeout-%%
 
-## method: PageAssertions.toHaveTitle
+## async method: PageAssertions.toHaveTitle
 * langs:
   - alias-java: hasTitle
 
@@ -119,6 +144,10 @@ from playwright.sync_api import expect
 expect(page).to_have_title(re.compile(r".*checkout"))
 ```
 
+```csharp
+await Expect(page).ToHaveTitle("Playwright");
+```
+
 ### param: PageAssertions.toHaveTitle.titleOrRegExp
 - `titleOrRegExp` <[string]|[RegExp]>
 
@@ -126,7 +155,7 @@ Expected title or RegExp.
 
 ### option: PageAssertions.toHaveTitle.timeout = %%-assertions-timeout-%%
 
-## method: PageAssertions.toHaveURL
+## async method: PageAssertions.toHaveURL
 * langs:
   - alias-java: hasURL
 
@@ -156,6 +185,10 @@ from playwright.sync_api import expect
 expect(page).to_have_url(re.compile(".*checkout"))
 ```
 
+```csharp
+await Expect(page).ToHaveURL(new Regex(".*checkout"));
+```
+
 ### param: PageAssertions.toHaveURL.urlOrRegExp
 - `urlOrRegExp` <[string]|[RegExp]>
 
diff --git a/docs/src/api/class-playwrightassertions.md b/docs/src/api/class-playwrightassertions.md
index f9de4db3a6..efae573653 100644
--- a/docs/src/api/class-playwrightassertions.md
+++ b/docs/src/api/class-playwrightassertions.md
@@ -1,5 +1,4 @@
 # class: PlaywrightAssertions
-* langs: java, python, js
 
 The [PlaywrightAssertions] class provides convenience methods for creating assertions that will wait until the expected condition is met.
 
@@ -48,6 +47,26 @@ public class TestExample {
 }
 ```
 
+```csharp
+using System.Threading.Tasks;
+using Microsoft.Playwright.NUnit;
+using NUnit.Framework;
+
+using static Microsoft.Playwright.Assertions;
+
+namespace Playwright.TestingHarnessTest.NUnit
+{
+    public class ExampleTests : PageTest
+    {
+        [Test]
+        public async Task StatusBecomesSubmitted()
+        {
+            await Expect(Page.Locator(".status")).ToHaveTextAsync("Submitted");
+        }
+    }
+}
+```
+
 Playwright will be re-testing the node with the selector `.status` until fetched Node has the `"Submitted"`
 text. It will be re-fetching the node and checking it over and over, until the condition is met or until the timeout is
 reached. You can pass this timeout as an option.
@@ -59,6 +78,7 @@ By default, the timeout for assertions is set to 5 seconds.
   - alias-java: assertThat
   - alias-python: expect
   - alias-js: expect
+  - alias-csharp: Expect
 - returns: <[APIResponseAssertions]>
 
 Creates a [APIResponseAssertions] object for the given [APIResponse].
@@ -73,10 +93,11 @@ PlaywrightAssertions.assertThat(response).isOK();
 [APIResponse] object to use for assertions.
 
 ## method: PlaywrightAssertions.expectLocator
-* langs: java, python, js
+* langs:
   - alias-java: assertThat
   - alias-python: expect
   - alias-js: expect
+  - alias-csharp: Expect
 - returns: <[LocatorAssertions]>
 
 Creates a [LocatorAssertions] object for the given [Locator].
@@ -85,16 +106,21 @@ Creates a [LocatorAssertions] object for the given [Locator].
 PlaywrightAssertions.assertThat(locator).isVisible();
 ```
 
+```csharp
+await Expect(locator).ToBeVisibleAsync();
+```
+
 ### param: PlaywrightAssertions.expectLocator.locator
 - `locator` <[Locator]>
 
 [Locator] object to use for assertions.
 
 ## method: PlaywrightAssertions.expectPage
-* langs: java, python, js
+* langs:
   - alias-java: assertThat
   - alias-python: expect
   - alias-js: expect
+  - alias-csharp: Expect
 - returns: <[PageAssertions]>
 
 Creates a [PageAssertions] object for the given [Page].
@@ -103,6 +129,10 @@ Creates a [PageAssertions] object for the given [Page].
 PlaywrightAssertions.assertThat(page).hasTitle("News");
 ```
 
+```csharp
+await Expect(page).ToHaveTitleAsync("News");
+```
+
 ### param: PlaywrightAssertions.expectPage.page
 - `page` <[Page]>
 
diff --git a/docs/src/api/params.md b/docs/src/api/params.md
index 03bbd5180d..60ae684d17 100644
--- a/docs/src/api/params.md
+++ b/docs/src/api/params.md
@@ -710,7 +710,7 @@ using the [`method: AndroidDevice.setDefaultTimeout`] method.
 Time to retry the assertion for. Defaults to `timeout` in [`property: TestConfig.expect`].
 
 ## assertions-timeout
-* langs: java, python
+* langs: java, python, csharp
 - `timeout` <[float]>
 
 Time to retry the assertion for.