CSharpSyntaxValidator is a .NET Core CLI tool that validates a C# source for syntax errors and sets its exit code to zero (0) if the C# source is valid and one (1) if invalid.

It is not a linter for C#.

You will need .NET Core SDK 2.2 or later installed.

Install CSharpSyntaxValidator as follows:

dotnet tool install --global CSharpSyntaxValidator

Simply invoke supplying C# source on standard input:

csval < Program.cs && echo OK

If the source is valid, the above will print OK on your terminal.

Alternatively, supply the file name directly:

csval Program.cs && echo OK

For more help on usage, run with the -h option:

csval -h

The .NET Core SDK is the minimum requirement.

To build just the binaries on Windows, run:

.\build.cmd

On Linux or macOS, run instead:

./build.sh

To build the binaries and the NuGet package on Windows, run:

.\pack.cmd

On Linux or macOS, run instead:

./pack.sh