diff --git a/packages/trace-viewer/src/ui/codegen.ts b/packages/trace-viewer/src/ui/codegen.ts
index 17492d2087..8fe2d78591 100644
--- a/packages/trace-viewer/src/ui/codegen.ts
+++ b/packages/trace-viewer/src/ui/codegen.ts
@@ -165,10 +165,95 @@ class PythonCodeGen implements APIRequestCodegen {
   }
 }
 
+class CSharpCodeGen implements APIRequestCodegen {
+  generatePlaywrightRequestCall(request: har.Request, body: string | undefined): string {
+    const url = new URL(request.url);
+    const urlParam = `${url.origin}${url.pathname}`;
+    const options: any = {};
+
+    const initLines: string[] = [];
+
+    let method = request.method.toLowerCase();
+    if (!['delete', 'get', 'head', 'post', 'put', 'patch'].includes(method)) {
+      options.Method = method;
+      method = 'fetch';
+    }
+
+    if (url.searchParams.size)
+      options.Params = Object.fromEntries(url.searchParams.entries());
+    if (body)
+      options.Data = body;
+    if (request.headers.length)
+      options.Headers = Object.fromEntries(request.headers.map(header => [header.name, header.value]));
+
+    const params = [`"${urlParam}"`];
+    const hasOptions = Object.keys(options).length > 0;
+    if (hasOptions)
+      params.push(this.prettyPrintObject(options));
+
+    return `${initLines.join('\n')}${initLines.length ? '\n' : ''}await request.${this.toFunctionName(method)}(${params.join(', ')});`;
+  }
+
+  private toFunctionName(method: string): string {
+    return method[0].toUpperCase() + method.slice(1) + 'Async';
+  }
+
+  private indent(v: string, level: number): string {
+    return v.split('\n').map(s => ' '.repeat(level) + s).join('\n');
+  }
+
+  private prettyPrintObject(obj: any, indent = 2, level = 0): string {
+    // Handle null and undefined
+    if (obj === null)
+      return 'null';
+    if (obj === undefined)
+      return 'null';
+
+    // Handle primitive types
+    if (typeof obj !== 'object') {
+      if (typeof obj === 'string')
+        return `"${obj.replace(/"/g, '\\"')}"`;
+      if (typeof obj === 'boolean')
+        return obj ? 'true' : 'false';
+      return String(obj);
+    }
+
+    // Handle arrays
+    if (Array.isArray(obj)) {
+      if (obj.length === 0)
+        return 'new object[] {}';
+      const spaces = ' '.repeat(level * indent);
+      const nextSpaces = ' '.repeat((level + 1) * indent);
+
+      const items = obj.map(item =>
+        `${nextSpaces}${this.prettyPrintObject(item, indent, level + 1)}`
+      ).join(',\n');
+
+      return `new object[] {\n${items}\n${spaces}}`;
+    }
+
+    // Handle regular objects
+    if (Object.keys(obj).length === 0)
+      return 'new {}';
+    const spaces = ' '.repeat(level * indent);
+    const nextSpaces = ' '.repeat((level + 1) * indent);
+
+    const entries = Object.entries(obj).map(([key, value]) => {
+      const formattedValue = this.prettyPrintObject(value, indent, level + 1);
+      const formattedKey = level === 0 ? key : `["${key}"]`;
+      return `${nextSpaces}${formattedKey} = ${formattedValue}`;
+    }).join(',\n');
+
+    return `new() {\n${entries}\n${spaces}}`;
+  }
+}
+
 export function getAPIRequestCodeGen(language: Language): APIRequestCodegen {
   if (language === 'javascript')
     return new JSCodeGen();
   if (language === 'python')
     return new PythonCodeGen();
+  if (language === 'csharp')
+    return new CSharpCodeGen();
   throw new Error('Unsupported language: ' + language);
 }
diff --git a/tests/library/unit/codegen.spec.ts b/tests/library/unit/codegen.spec.ts
index 6680de8796..32bc7db7ef 100644
--- a/tests/library/unit/codegen.spec.ts
+++ b/tests/library/unit/codegen.spec.ts
@@ -395,3 +395,88 @@ await page.request.get(
   });
 
 });
+
+test.describe('csharp', () => {
+  const impl = getAPIRequestCodeGen('csharp');
+
+  test('generatePlaywrightRequestCall', () => {
+    expect(impl.generatePlaywrightRequestCall({
+      url: 'http://example.com/foo?bar=baz',
+      method: 'GET',
+      headers: [{ name: 'User-Agent', value: 'Mozilla/5.0' }, { name: 'Date', value: '2021-01-01' }],
+      httpVersion: '1.1',
+      cookies: [],
+      queryString: [],
+      headersSize: 0,
+      bodySize: 0,
+      comment: '',
+    }, 'foo')).toEqual(`
+await request.GetAsync("http://example.com/foo", new() {
+  Params = new() {
+    ["bar"] = "baz"
+  },
+  Data = "foo",
+  Headers = new() {
+    ["User-Agent"] = "Mozilla/5.0",
+    ["Date"] = "2021-01-01"
+  }
+});`.trim());
+
+    expect(impl.generatePlaywrightRequestCall({
+      url: 'http://example.com/foo?bar=baz',
+      method: 'OPTIONS',
+      headers: [],
+      httpVersion: '1.1',
+      cookies: [],
+      queryString: [],
+      headersSize: 0,
+      bodySize: 0,
+      comment: '',
+    }, undefined)).toEqual(`
+await request.FetchAsync("http://example.com/foo", new() {
+  Method = "options",
+  Params = new() {
+    ["bar"] = "baz"
+  }
+});`.trim());
+  });
+
+  test('generatePlaywrightRequestCall with POST method and no body', () => {
+    expect(impl.generatePlaywrightRequestCall({
+      url: 'http://example.com/foo',
+      method: 'POST',
+      headers: [{ name: 'Content-Type', value: 'application/json' }],
+      httpVersion: '1.1',
+      cookies: [],
+      queryString: [],
+      headersSize: 0,
+      bodySize: 0,
+      comment: '',
+    }, undefined)).toEqual(`
+await request.PostAsync("http://example.com/foo", new() {
+  Headers = new() {
+    ["Content-Type"] = "application/json"
+  }
+});`.trim());
+  });
+
+  test('generatePlaywrightRequestCall with PUT method and JSON body', () => {
+    expect(impl.generatePlaywrightRequestCall({
+      url: 'http://example.com/foo',
+      method: 'PUT',
+      headers: [{ name: 'Content-Type', value: 'application/json' }],
+      httpVersion: '1.1',
+      cookies: [],
+      queryString: [],
+      headersSize: 0,
+      bodySize: 0,
+      comment: '',
+    }, '{"key":"value"}')).toEqual(`
+await request.PutAsync("http://example.com/foo", new() {
+  Data = "{\\"key\\":\\"value\\"}",
+  Headers = new() {
+    ["Content-Type"] = "application/json"
+  }
+});`.trim());
+  });
+});