Added web assembly

WebAssembly/Pages/Counter.razor

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+@page "/counter"
+@using System.Diagnostics
+
+<PageTitle>Counter</PageTitle>
+
+<h1>Counter</h1>
+
+<p role="status">Current count: @_currentCount</p>
+<p role="status">Runtime: @_stopwatch.Elapsed.ToString("g")</p>
+
+
+<button class="btn btn-success" @onclick="Start">Start</button>
+<button class="btn btn-danger" @onclick="Stop">Stop</button>
+<button class="btn btn-secondary" @onclick="Reset">Reset</button>
+
+@code {
+    private int _currentCount = 0;
+    private bool _cancel;
+    private readonly Stopwatch _stopwatch = new();
+    
+    private async Task Start()
+    {
+        _stopwatch.Start();
+        _cancel = false;
+        while (!_cancel)
+        {
+            _currentCount++;
+            StateHasChanged();
+            await Task.Delay(10);
+        }
+        _stopwatch.Stop();
+    }
+
+    private void Stop()
+    {
+        _cancel = true;
+    }
+
+    private void Reset()
+    {
+        _cancel = true;
+        _currentCount = 0;
+        _stopwatch.Reset();
+    }
+}

WebAssembly/Pages/FetchData.razor

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+@page "/fetchdata"
+@inject HttpClient Http
+
+<PageTitle>Weather forecast</PageTitle>
+
+<h1>Weather forecast</h1>
+
+<p>This component demonstrates fetching data from the server.</p>
+
+@if (forecasts == null)
+{
+    <p><em>Loading...</em></p>
+}
+else
+{
+    <table class="table">
+        <thead>
+            <tr>
+                <th>Date</th>
+                <th>Temp. (C)</th>
+                <th>Temp. (F)</th>
+                <th>Summary</th>
+            </tr>
+        </thead>
+        <tbody>
+            @foreach (var forecast in forecasts)
+            {
+                <tr>
+                    <td>@forecast.Date.ToShortDateString()</td>
+                    <td>@forecast.TemperatureC</td>
+                    <td>@forecast.TemperatureF</td>
+                    <td>@forecast.Summary</td>
+                </tr>
+            }
+        </tbody>
+    </table>
+}
+
+@code {
+    private WeatherForecast[]? forecasts;
+
+    protected override async Task OnInitializedAsync()
+    {
+        forecasts = await Http.GetFromJsonAsync<WeatherForecast[]>("sample-data/weather.json");
+    }
+
+    public class WeatherForecast
+    {
+        public DateTime Date { get; set; }
+
+        public int TemperatureC { get; set; }
+
+        public string? Summary { get; set; }
+
+        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+    }
+}

WebAssembly/Pages/Index.razor

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+@page "/"
+
+<PageTitle>Index</PageTitle>
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.
+
+<SurveyPrompt Title="How is Blazor working for you?" />