The type or namespace name 'HttpClient' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'HttpClient' could not be found (are you missing a using directive or an assembly reference?)

Process completed with exit code 1.

Use 'string.IndexOf(char)' instead of 'string.IndexOf(string)' when you have a string with a single char (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1865)

Use 'string.IndexOf(char)' instead of 'string.IndexOf(string)' when you have a string with a single char (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1865)

Use 'string.IndexOf(char)' instead of 'string.IndexOf(string)' when you have a string with a single char (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1865)