The result of the expression is always 'true' since a value of type 'DateTime' is never equal to 'null' of type 'DateTime?'

This call site is reachable on all platforms. 'Grid.this[int, int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Cell.Tag' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'GridRows.this[int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Grid.this[int, int]' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Grid.Rows' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'GridVirtual.SelectionMode' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'IView.BackColor' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'GridSelectionMode.Row' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'Grid.Redim(int, int)' is only supported on: 'Windows' 7.0 and later. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)