net10.0-windows7.0 
namespace System.Text.RegularExpressions
{
    [EditorBrowsable(EditorBrowsableState.Never)]
    public abstract class RegexRunner
    {
        protected int MatchIndex(int cap);
    }
}
nuget.org
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Reference this API
.NET 5.06.07.08.09.010.0
.NET Core 1.01.12.02.12.23.03.1
.NET Framework 1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard 1.62.02.1
Information specific to net10.0
Platforms This API is only available when you target a specific platform:
Windows 7.0
Information specific to net10.0-windows7.0
Assembly

System.Text.RegularExpressions , Version=4.1.1.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to System.Text.RegularExpressions.

Package System.Text.RegularExpressions (4.3.1) netcoreapp1.1
Platform Restrictions

This API is supported on all platforms.

  • Built-in API
  • Package-provided API