CRR0007 - String format item/argument mismatch

• Feb 28, 2025

This analyzer detects formatted strings whose format does not correspond to arguments.

• C#
• VB.NET

string s = string.Format("{0} {2}", arg1, arg2); // CRR0007

Dim s As String = String.Format("{0} {2}", arg1, arg2) ' CRR0007

In the example above, you can fix the mistake by adding the third parameter, which will be referred by the “ {2} “ placeholder, or changing the code as follows.

• C#
• VB.NET

string s = string.Format("{0} {1}", arg1, arg2);

Dim s As String = String.Format("{0} {1}", arg1, arg2)

See Also

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