[http-server-csharp] Templated model reported error when generating

[ArcturusZhang]

I am using the petstore as spec to generate server code: https://github.com/microsoft/typespec/tree/main/packages/samples/specs/petstore
This is the stack trace of the issue:

Emitter "@typespec/http-server-csharp" crashed! This is a bug.
Please file an issue at https://github.com/microsoft/typespec/issues

Error: Encountered type TemplateParameter which we don't know how to emit.
    at compilerAssert (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/core/diagnostics.js:140:11)
    at typeEmitterKey (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:619:17)
    at Object.emitType (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:239:25)
    at file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:161:37
    at withPatchedReferenceContext (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:540:20)
    at Object.emitTypeReference (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:144:20)
    at #findPropertyType (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/http-server-csharp/dist/src/service.js:219:50)
    at CSharpCodeEmitter.modelPropertyLiteral (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/http-server-csharp/dist/src/service.js:192:67)
    at file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:377:55
    at withTypeContext (file:///C:/Users/dapzhang/Documents/workspace/playground/tsp-random-project/spec/node_modules/@typespec/compiler/dist/src/emitter-framework/asset-emitter.js:520:9)